SHENZHEN DONGKE SEMICONDUCTOR CO., LTD
SMALL POWER OFF-LINE SWITCH MODE POWER CONTROLLER -DK1203 SPECIFICATION
1. DESCRIPTION
The DK1203 is a secondary side flyback type AC-DC Switch Mode Power Controlling
IC. With integrated 700V high voltage power transistor,patented self-power suppl
y circuit and integrated MOS circuit design, lots of external components are sav
ed, transformer design is simple, only two windings is needed for the transforme
r in isolated output circuit. 2. APPLICATIONS AC/DC power adapters Air conditioner power supply DVB power supply TV/Monitor power supply DVD/VCD power supply Electromagnetic oven power supply LED driver applications 3. MAIN FEATURES 85V—265V wide range AC power input. Build-in 700V power transistor. Internal integrated high voltage starting circuit, no need for additional resistance. Integrated self-start circuit. Pulse-Width Modulation (PWM) controlled system. VCC operating voltage range: 4-6V. 65kHz switching frequency. Automatically turn to skip cycle mode under light load condition. Over current, Over loading, Over temperature and Over voltage Protection. Standby power consumption lower then 0.3W. Internal frequency modulation circuit to reduce EMI filter cost. 4. POWER RANGE
Input Voltage
MAX. output power 85-265V AC 85-145V AC 180-265V AC 12W 12W 18W Address: Building 18, Hejing industrial zone, Heping village, Fuyong, Baoan Area, Shenzhen, China.
Website: www.dkpower.cn
Tel: 86-755-29598396
Email: amy@dkpower.cn 1 SHENZHEN DONGKE SEMICONDUCTOR CO., LTD
SMALL POWER OFF-LINE SWITCH MODE POWER CONTROLLER -DK1203 5. CONNECTION DIAGRAM (DIP-8) PIN FUNCTION
Pin NO. Pin Name Function 1 OB 2 VCC Power supply of control circuits, contacted with an external grounded capacitor of
10uF~100uF 3 GND Ground reference 4 NC Empty pin without internal connection. 5 FB Feedback control pin ， connected with 1nF ～ 10nF grounded capacitor, coupler
grounded to control output. 6 NC Empty pin without internal connection. 7,8 OC Output pin. Connected with internal high voltage Collector point and switch mode
transformer. Startup pin. Internal startup circuit to contact with OC pin. 6. ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit Vcc Supply voltage -0.3V-8 V Ivcc Current of supply voltage 100 mA Vpin Pin voltage -0.3-Vcc+0.3 V Vcol Collector to GND voltage -0.3-730 V Ip Peak current 0.8 A Pd Dissipation power 1000 mW Tc Case operating temperature -20-+125 ℃ Tstg Storage temperature -55-+150 ℃ Tsol Soldering temperature +280 ℃/5S Address: Building 18, Hejing industrial zone, Heping village, Fuyong, Baoan Area, Shenzhen, China. …
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